It's been more than a month since 43 college students went missing in Mexico, and their families still have no answers. As they grow impatient with authorities, protests have broken out and gone as far as burning Iguala's City Hall. The mayor of that city was arrested, along with his wife and many others, in connection to the crime. But besides that, there's been little progress in the case.

After his party's losses in the midterm elections, President Barack Obama will wade into a mass of foreign policy challenges during his trip to Asia this week.

Obama made America's pivot to Asia a centerpiece of his foreign policy architecture. But some commentators say the President, beset by crises elsewhere, has failed to put words into action.

"The Asia pivot remains more rhetoric than reality," CNN's Fareed Zakaria said. "Having promised a larger U.S. military presence in the Philippines, Singapore and Australia, there is little evidence of any of this on the ground."

Obama arrived Monday in Beijing, where the greater U.S. focus on Asia is viewed with deep suspicion.